AI 中文总结
该研究提出级联微环谐振器方案，解决单腔压缩源的深度与带宽权衡问题，其平顶压缩光谱收敛更快，可在集成光子平台上实用化产生宽带压缩光
AI 中文摘要
宽带压缩光作为马尔可夫库可指数级增强光与物质相互作用，有益于量子技术。然而，传统单腔光源在压缩深度和光谱带宽之间存在权衡。我们提出一种可扩展方案，利用级联的参量微环谐振器耦合至公共总线波导，生成宽带压缩真空。通过分析输出，我们确定了在腔内泵浦衰减的实际条件下仍能产生宽且平顶压缩光谱的特定条件。我们证明该架构对制造缺陷具有鲁棒性，包括谐振器频率不均匀和组件故障。我们表明，平顶光谱收敛到马尔可夫极限的速度比单腔洛伦兹分布快得多。仅由N=5个耦合谐振器组成的阵列，其本征损耗比为κ_I/κ=0.1，将达到相同压缩所需的带宽降至单腔的四分之一。这种快速收敛放宽了单宽带腔对低Q值和高增益的限制，将压缩过程分布在适度泵浦的谐振器上，为在成熟的集成光子平台上构建压缩库提供了实用途径。
英文摘要
Broadband squeezed light functioning as a Markovian reservoir can exponentially enhance light-matter interactions, benefiting quantum technologies. However, conventional single-cavity sources face a trade-off between squeezing depth and spectral bandwidth. We propose a scalable scheme for generating broadband squeezed vacuum using a cascade of parametric microring resonators coupled to a common bus waveguide. By analyzing the output, we identify the specific conditions that yield a broad, flat-topped squeezing spectrum, even under realistic intracavity pump attenuation. We demonstrate that this architecture is robust against fabrication imperfections, including inhomogeneous resonator frequencies and component failures. We show that the flat-topped spectrum converges to the Markovian limit significantly faster than a single-cavity Lorentzian profile. An array of as few as $N=5$ coupled resonators with an intrinsic loss ratio of $κ_I/κ= 0.1$ reduces the required bandwidth to a quarter of that needed by a single cavity to achieve same squeezing. This rapid convergence relaxes the low-$Q$ and high-gain constraints of single broadband cavities, distributing the squeezing process across moderately pumped resonators to provide a practical route for engineering squeezed reservoirs on mature integrated photonic platforms.
Comments5 pages, 4 figures
